Keyword: antimatter

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  • Excess antielectrons aren’t from nearby dead stars, study says

    11/26/2017 8:31:20 PM PST · by ETL · 28 replies ^ | November 16, 2017 | Emily Conover
    The finding keeps open the possibility that the particles come from dark matter New observations of the whirling cores of dead stars have deepened the mystery behind a glut of antimatter particles raining down on Earth from space. The particles are antielectrons, also known as positrons, and could be a sign of dark matter — the exotic and unidentified culprit that makes up the bulk of the universe’s mass. But more mundane explanations are also plausible: Positrons might be spewed from nearby pulsars, the spinning remnants of exploded stars, for example. But researchers with the High-Altitude Water Cherenkov Observatory, or...
  • Earthbound Antimatter Mystery Deepens After Scientists Rule Out Pulsar Source

    11/17/2017 9:19:32 AM PST · by BenLurkin · 29 replies ^ | November 16, 2017 | Harrison Tasoff,
    The recent finding, detailed in the journal Science today (Nov. 17), concerns positrons, the antimatter complements of electrons. High-energy particles, usually protons, traveling across the galaxy can create pairs of positrons and electrons when they interact with dust and gas in space, study co-author Hao Zhou, at Los Alamos National Lab, told In 2008, the space-based PAMELA detector measured unexpectedly high numbers of earthbound positrons. This was about 10 times what they were expecting to see, according to Zhou. ... Zhou's team made detailed measurements of the gamma-rays coming from the direction of two nearby pulsars — Geminga and its companion...
  • Spectrum of Antimatter Observed for First Time

    12/19/2016 4:31:37 PM PST · by BenLurkin · 52 replies ^ | 19 Dec , 2016 | Matt Williams
    Ever since the existence of antimatter was proposed in the early 20th century, scientists have sought to understand how relates to normal matter, and why there is an apparent imbalance between the two in the Universe. To do this, particle physics research in the past few decades has focused on the anti-particle of the most elementary and abundant atom in the Universe – the antihydrogen particle. Until recently, this has been very difficult, as scientists have been able to produce antihydrogen, but unable to study it for long before it annihilated. But according to recent a study that was published...
  • Mystery Deepens: Matter and Antimatter Are Mirror Images

    08/14/2015 9:14:59 AM PDT · by BenLurkin · 37 replies
    Live Science ^ | Charles Q. Choi
    Matter and antimatter appear to be perfect mirror images of each other as far as anyone can see, scientists have discovered with unprecedented precision, foiling hope of solving the mystery as to why there is far more matter than antimatter in the universe. Everyday matter is made up of protons, neutrons or electrons. These particles have counterparts known as antiparticles — antiprotons, antineutrons and positrons, respectively — that have the same mass but the opposite electric charge. (Although neutrons and antineutrons are both neutrally charged, they are each made of particles known as quarks that possess fractional electrical charges, and...
  • Physicists find ways to increase antihydrogen production

    05/21/2015 12:33:22 AM PDT · by LibWhacker · 13 replies
    PhysOrg ^ | 5/20/15 | Lisa Zyga
    Physicists find ways to increase antihydrogen production 18 hours ago by Lisa Zyga feature Antihydrogen consists of an antiproton and a positron. Credit: public domain (—There are many experiments that physicists would like to perform on antimatter, from studying its properties with spectroscopic measurements to testing how it interacts with gravity. But in order to perform these experiments, scientists first need some antimatter. Of course, they won't be finding any in nature (due to antimatter's tendency to annihilate in a burst of energy when it comes in contact with ordinary matter), and creating it in the lab has proven to...
  • New Particle Is Both Matter and Antimatter

    10/03/2014 12:14:19 PM PDT · by BenLurkin · 19 replies ^ | Oct 2, 2014 | |By Clara Moskowitz
    The new Majorana particle showed up inside a superconductor, a material in which the free movement of electrons allows electricity to flow without resistance. The research team, led by Ali Yazdani of Princeton University, placed a long chain of iron atoms, which are magnetic, on top of a superconductor made of lead. Normally, magnetism disrupts superconductors, which depend on a lack of magnetic fields for their electrons to flow unimpeded. But in this case the magnetic chain turned into a special type of superconductor in which electrons next to one another in the chain coordinated their spins to simultaneously satisfy...
  • 'We may be able to watch dark energy turn on': U-M involved in unprecedented sky survey

    09/03/2013 4:20:57 PM PDT · by LibWhacker · 5 replies
    U-Mich ^ | 9/3/13 | Nicole Casal Moore
    ANN ARBOR—Moonless nights outside the Cerro Tololo astronomical observatory in Chile are so dark that when you look down, you can't see your feet. "You can't see your hands," said David Gerdes, physics professor at the University of Michigan. "But you can hold them up to the sky and see a hand-shaped hole with no stars in it. It's really incredible." From this site in the Andes over the next five years, an international team will map one-eighth of the sky in unprecedented detail—aiming to make a time lapse of the past 8 billion years of a slice of the...
  • Strange Particles Shape-Shift From One Flavor to Another

    07/23/2013 9:35:29 AM PDT · by SeekAndFind · 16 replies
    Live Science ^ | 07/23/2013
    Exotic particles called neutrinos have been caught in the act of shape-shifting, switching from one flavor to another, in a discovery that could help solve the mystery of antimatter. Neutrinos come in three flavors — electron, muon and tau — and have been known to change, or oscillate, between certain flavors. Now, for the first time, scientists can definitively say they've discovered muon neutrinos changing into electron neutrinos. The discovery was made at the T2K neutrino experiment in Japan, where scientists sent a beam of muon neutrinos from the J-PARC laboratory in Tokai Village on the eastern coast of Japan,...
  • Physicists create tabletop antimatter 'gun'

    06/25/2013 10:10:32 AM PDT · by Red Badger · 49 replies
    Phys.Org ^ | 06-25-2013 | Bob Yirka
    ( —An international team of physicists working at the University of Michigan has succeeded in building a tabletop antimatter "gun" capable of spewing short bursts of positrons. In their paper published in the journal Physical Review Letters, the team describes how they created the gun, what it's capable of doing, and to what use it may be put. Positrons are anti-particles, the opposite twin of electrons. Besides being created in physics labs, they are also found in jets emitted by black holes and pulsars. To date, the creation of positrons for study has involved very big and expensive machines. One...
  • Would an antimatter apple fall upward from the earth?

    04/30/2013 8:42:03 PM PDT · by BenLurkin · 28 replies
    LATimes ^ | April 30, 2013, 11:46 a.m. | Eryn Brown
    ... Theorists think that ordinary matter and antimatter, which annihilate when they come into contact with each other, were generated in equal quantities during the Big Bang. But there must be some differences between the two types of matter, they also think, because otherwise matter and antimatter would have canceled each other out completely and there would be no universe. Scientists at CERN are making atoms of antihydrogen to try to pin down what those differences might be. But they're also willing to consider the possibility that the ideas were wrong in the first place, said Joel Fajans, a professor...
  • The Mysterious 'Majorana Fermion' --At the Border Between Matter & Antimatter

    10/05/2012 4:06:16 PM PDT · by LibWhacker · 15 replies
    Daily Galaxy ^ | 10/5/12
    In 1938 one of the world's greatest scientists withdrew all his money and disappeared during a boat trip from Palermo to Naples. Whether he killed himself, was murdered or lived on under a different identity is still not known. But no trace of The Italian physicist Ettore Majorana has ever been found. Majorana was a brilliant theorist who in the 1930's showed great insight into physics at a young age. He discovered a hitherto unknown solution to the equations from which quantum scientists deduce elementary particles: the Majorana fermion. Majorana deduced from quantum theory the possibility that there must be...
  • Is the New Physics Here? Atom Smashers Get an Antimatter Surprise

    11/19/2011 7:56:00 AM PST · by decimon · 14 replies
    Live Science ^ | November 17, 2011
    The world's largest atom smasher, designed as a portal to a new view of physics, has produced its first peek at the unexpected: bits of matter that don't mirror the behavior of their antimatter counterparts. The discovery, if confirmed, could rewrite the known laws of particle physics and help explain why our universe is made mostly of matter and not antimatter. Scientists at the Large Hadron Collider, the 17-mile (27 km) circular particle accelerator underground near Geneva, Switzerland, have been colliding protons at high speeds to create explosions of energy. From this energy many subatomic particles are produced. Now researchers...
  • LHC results may solve riddle of how universe can exist

    11/15/2011 9:34:28 AM PST · by Ernest_at_the_Beach · 26 replies · 1+ views ^ | 15th November 2011 15:28 GMT | Lewis Page
    Top boffins at the Large Hadron Collider – mightiest particle-punisher and largest machine of any kind ever assembled by humanity – say that they may have uncovered a vital clue explaining one of the greatest mysteries of physics: namely, how is it that matter itself can exist? This is a mystery because the so-called Standard Model of physics calls for ordinary matter and antimatter to decay in very similar ways. Theory also says that equal amounts of antimatter and regular-type matter (such as that making up the Sun, the Earth, all the life upon it including us etc) should have...
  • Antimatter Belt Found Circling Earth

    08/12/2011 12:24:36 AM PDT · by neverdem · 29 replies
    ScienceNow ^ | 9 August 2011 | Ron Cowen
    Enlarge Image Antimatter reservoir. A newly discovered belt of antiprotons lies within the innermost portion (pink) of Earth's magnetosphere, the large bubblelike region interior to the blue arc that is controlled by the planet's magnetic field. Credit: Aaron Kaase/NASA/Goddard A newly discovered belt of antimatter circling Earth could be an astronaut's best friend. The belt, which consists of antiprotons trapped by Earth's magnetic field several hundred kilometers above the planet's surface, may ultimately become a key source of fuel for missions venturing beyond the solar system. Researchers analyzing data from the PAMELA (Payload for Antimatter/Matter Exploration and Light-nuclei Astrophysics)...
  • Earth's Dirty Secret: Our Magnetic Field Traps Antimatter

    08/08/2011 10:56:11 AM PDT · by Reeses · 10 replies
    Daily Tech ^ | August 8, 2011 | Jason Mick
    Satellite confirms the existence of antimatter belts surrounding our planet, opens hopes for fuel use The proton is a familiar figure for those who have taken high school physics. With a +1 charge it is a key constituent to most of the matter of the universe. But nature holds an outlandish vanishing twin -- the antiproton. This exotic antimatter particle carries a -1 charge. Now astrophysicists have discovered a treasure trove of antimatter hidden in the Earth's magnetic field, which could hold the key to grand insights and new space travel possibilities. I. What is Antimatter? The antiproton was first...
  • Antiproton Radiation Belt Discovered Around Earth

    08/05/2011 12:37:17 PM PDT · by Red Badger · 45 replies
    MIT TEchnology Review ^ | 08-05-2011 | Staff
    Physicists have long suspected that antiprotons must become trapped in a belt around Earth. Now they've found it. The Earth is constantly bombarded by high energy particles called cosmic rays. These are generated by the Sun and by other sources further afield. (The source of the highest energy cosmic rays is still a mystery). The particles are generally protons, electrons and helium nuclei and when they collide with nuclei in the Earth's upper atmosphere they can produce showers of daughter particles. These showers can be so extensive that they can easily be observed from the ground. Astronomers long ago realised...
  • Physicists Claim Antimatter Breakthrough

    02/20/2002 5:52:00 PM PST · by blam · 94 replies · 252+ views
    Ananova ^ | 2-20-2002
    Physicists claim antimatter breakthrough Physicists in Switzerland say they have captured antimatter for the first time. Scientists have often wondered whether they can get energy from the reaction when antimatter and matter collide. Until now they have found it difficult to make and control antiatoms. Researchers on the ATRAP experiment at CERN, the European Laboratory for Particle Physics near Geneva, now think they have succeeded. New Scientist reports they have made and stored thousands of antiatoms indefinitely in a particle trap. The team, led by Gerald Gabrielse of Harvard University, used powerful magnetic and electric fields to slow and ...
  • Upping the anti ("I've always liked hydrogen atoms")

    06/05/2011 12:58:34 PM PDT · by decimon · 17 replies · 1+ views
    University of Calgary ^ | June 5, 2011 | Unknown
    Canadian researchers instrumental in game-changing antimatter studyScience fiction is fast approaching science fact as researchers are progressing rapidly toward "bottling" antimatter. In a paper published online today by the journal Nature Physics, the ALPHA experiment at CERN, including key Canadian contributors, reports that it has succeeded in storing antimatter atoms for over 16 minutes. While carrying around bottled antimatter like in the movie Angels and Demons remains fundamentally far-fetched, storing antimatter for long periods of time opens up new vistas for scientists struggling to understand this elusive substance. ALPHA managed to store twice the antihydrogen (the antimatter partner to normal...
  • Has CERN made the VATICAN ANTIMATTER BOMB for real?*

    11/18/2010 5:45:05 AM PST · by markomalley · 7 replies · 1+ views
    The Register ^ | 11/18/2010 | Lewis Page
    So - Dan Brown's turgid blockbuster Angels and Demons, in which a nefarious papal official nicks a vial of antimatter from CERN as part of a complicated scheme to become Pope by menacing the Vatican with explosive destruction. Twaddle? Or actually a perfectly feasible plan ripped from today's headlines, style of thing? Just a few minor technical errors hereWe here on the Reg particle-meddling desk naturally have no interest in the arcane Vatican rules of succession, the putative Illuminati secret society, the likelihood of finding a priest in the Pope's inner circle who would be capable of flying a helicopter...
  • Antiatoms, All Out of Energy and Ready for Work

    06/06/2011 7:27:10 PM PDT · by neverdem · 16 replies
    ScienceNOW ^ | 5 June 2011 | Adrian Cho
    Enlarge Image Out with a bang. In this artist's rendition, an antihydrogen atom rattles around the ALPHA trap before escaping to create a pair of pions. Credit: CERN/ALPHA collaboration Just 6 months ago, physicists reported that they had trapped atoms made of antimatter for a fraction of a second. Now, the same team has held on to individual atoms of antihydrogen, each of which consists of an antiproton bound to a positron, for up to 15 minutes. That's long enough for an atom to lose all of its internal energy and settle into its least-energetic "ground state," a prerequisite...